Aplikasi Pemupukan Berimbang untuk Peningkatan Laju Pertumbuhan Tanaman Gaharu (Gyrinops verstegii) di Kabupaten Tabanan

Abstract

The research that purposed to find out the combination dosage of balanced fertilizing between
unorganic and organic fertilizers for growth rate increasing of gaharu was conducted at West Mundeh
Village, West Selemadeg District and Baturiti Village Kerambitan District, Tabanan Regency from August
2006 until August 2007. The factorial experiment used was randomized block design consisted of two
factors namely organic fertilizers as the first factor with four levels: 0 kg bokashi/tree; 2.5 kg bokashi/
tree; 5.0 Kg bokashi/tree; 7.5 kg bokashi/tree; and unorganic fertilizer (NPK fertilizers) as a second
factor with four levels: without NPK; 0.10 kg NPK/tree; 0.20 kg NPK/tree, and 0.30 kg NPK/tree.
There were 16 treatments with 4 replications. The result showed that no interaction between organic
and unorganic fertilizer treatments, however, each factors influenced growth rate increasing of gaharu
individually. Both organic (bokashi) and unorganic fertilizers (NPK) were increasing the stem diameters
and hight of plants gaharu. Treatments of 0.30 kg NPK/tree and 7.5 kg bokashi/tree indicated better
performance significantly for raising stem diameter than the others.